linux-kernel - Re: [PATCH v3 5/6] pwm: stm32: use input prescaler to improve period capture

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Message-ID: <20180416122519.5fnnyuuel64kfjfw@dell>
Date:   Mon, 16 Apr 2018 13:25:19 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Fabrice Gasnier <fabrice.gasnier@...com>
Cc:     thierry.reding@...il.com, alexandre.torgue@...com,
        benjamin.gaignard@...aro.org, robh+dt@...nel.org,
        mark.rutland@....com, linux@...linux.org.uk,
        mcoquelin.stm32@...il.com, benjamin.gaignard@...com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-pwm@...r.kernel.org
Subject: Re: [PATCH v3 5/6] pwm: stm32: use input prescaler to improve period
 capture

On Fri, 30 Mar 2018, Fabrice Gasnier wrote:

> Using input prescaler, capture unit will trigger DMA once every
> configurable /2, /4 or /8 events (rising edge). This helps improve
> period (only) capture accuracy at high rates.
> 
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@...com>
> Reviewed-by: Benjamin Gaignard <benjamin.gaignard@...aro.org>
> Acked-by: Thierry Reding <thierry.reding@...il.com>
> ---
> Changes in v2:
> - Adopt DMA read from MFD core.
> ---
>  drivers/pwm/pwm-stm32.c          | 63 ++++++++++++++++++++++++++++++++++++++--
>  include/linux/mfd/stm32-timers.h |  1 +

For my own reference:
  Acked-for-MFD-by: Lee Jones <lee.jones@...aro.org>

>  2 files changed, 62 insertions(+), 2 deletions(-)

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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